When the average modeler hangs a tuned pipe on his engine, hell most likely get very little increase in the engines power output, if at all. Why?
The secret to a tuned pipe is in the word “tuned”. It is like an organ pipe in the sense that it must be a specific length to be any good at all. A few pointers… There is no such thing as a pre-tuned, tuned-pipe assembly. Some manufacturers advertise that their pipes are just “bolt-on”. All that means is that the manufacturer is offering a broadly tuned pipe system that should work in most cases. It’s not a sure thing. For proper operation, every tuned-pipe installation must be tuned for the engine/propeller/fuel combination. Change prop or fuel, and the pipe will have to be re-tuned. If a pipe is not adjusted properly, it could result in the engine running too rich or too lean. If the pipe system is too short for the RPM the engine runs, it will make the engine run too lean, which will cause damage to the engine. If the pipe system is too long for the RPM the engine runs, the engine will trend rich, which will result in carbon buildup and wasted fuel. How it works: When a two-stroke
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